Edwin nobton



(No Model.)

E. NORTON. MANUFACTURING SHEET METAL BARREL BODIES..

Patented Deo. 21, 1886..

[FIT UNITED STATES` PATENT OFFICE.

EDWIN NORTON, OF CHICAGO, ILLINOIS, ASSIGNOR TO IIIMSELF AND OLIVER `YV.NORTON, SAME PLACE.

MANUFACTURING SHEET-METAL BARREL-BODIES.

SPECIFICATION forming part of Letters Patent No. 354,573, dated December21, 1886,

Application tiled September, 1886. Serial No. 2l1,5'13. (No model.)

T LZZ whom, L' may concern:

Beit known that I, EDWIN NORTON, a citizen ofthe United States, residingin Chicago, in the county of Cool; and State of Illinois, have inventeda new and useful Improvement in the Art of llfanufacturing Sheet-Metal,Barrel-Bodies, of which the following is a specication.

The object of this invention is to provide an improved process or methodof making sheet- Inetal bodies of a barrel-form from a singlerectangular sheet of metal Without cutting the same, and to this end itconsists, essentially,

in giving the bilge or tapering curved shape from the middle toward eachend of the barrel-body by forming a series of longitudinal tapering orgore shape folds or ribs in the sheet, the folds or ribs tapering fromeach end toward the middle, or in the opposite direction to the taper orcurve of the barrel itself. In this Way the surplus stock at the ends ofthe barrel, due to the diminished diameter of the barrel at its ends, istaken up Without niaterially stretching or straining the stock, and thebody at the same time given a true barrel form and greatly strengthenedby the longitudinally inwardly and radially projecting ribs or folds. A

It also consists in the series of steps or method in which thelongitudinal ribs or folds are formed and the body given its barrelformthat is to say, in, first, spacing or partially forming the folds onthe lines on which the rectangular sheet is to be folded to produce thetapering ribs or folds; second, pressing or squeezing the walls of suchpartially-formed folds together, and thus completing the folds or ribs;and, nally, turning down the coinpleted ribs flat against the rim of thebarrelbody at each end, so that the heads may be applied.

In order to give a full and clear explanation and description of theprocess, a sheet of metal is shown in the accompanying drawings duringthe several stages or steps of its manipulation according to my process.

In said drawings, which form a part of this specification, and in whichsimilar letters of reference indicate like parts, Figure lis a plan viewof a rectangular sheet of metal to be formed into a barrel-forni body,showing in dotted lines the lines upon which the folds are to be made toform the longitudinal tapering ribs or folds, and also the margins ofthe cross-beads, which form or represent the hoops of the barrel. Fig. 2is a perspective view of the sheet after the longitudinal tapering foldsare partially formed and the sheet curved into a circular form. Figs. 3,4, and' are sections of Fig. 2 on lines 3 3, 44, and 5 5. Fig. (showsthe body after the folds or ribs are completed by pressing or squeezingthe sides or walls of such ribs fiat together. Figs. 7 and 8 are crosssections on lines 7 7 and 8 8 of Fig. 6. Fig. 9 shows the barrel-for1nbody after the ribs or folds are turned down fiat at theirends forreception of the heads; and Fig. 10 isa View of the complete barrel.

The'sheet A is first spaced or partially folded, as indicated in Fig. 2,along the central and converging marginal lines, a a a', of the folds orribs B, so that the sides or walls Z) b of said folds or ribs formtriangular grooves or chan` nels tapering from each end toward themiddle, and at the same time the sheet is curved into circular form andalso given a slight longitudinal curvature or bilge, as the increasedsize and depth of the triangular grooves b b toward each endf somewhatcontracts the diameter ofthe body at its ends as compared With itsmiddle. The partial folds or trianguiar grooves b b are preferablyformed consecutively or one after another, and any suitable tool ormachine may be used for this purpose-as, for example, a stamp and die.The transverse hoop-beads C may be either formed simultaneously with orbefore the-partiallyformed folds or grooves b b. After the sheet ispartially folded and formed, as indicated in Fig. 2, the sides or Wallsb b of the grooves are squeezed or pressed fiat together, as indicatedin Figs. 67, and 8, thus finishing the ribs B, and still morecontracting the diameter of the bodyat its ends and giving it a truebarrel shape or longitudinal curvature,with inwardly and radiallyprojecting ribs or folds tapering from each end toward the middle orbilge of 'the barrel. One of the ribs `B is half formed on each of themeeting edges of the sheet, so that the two parts or radial iiangesabutting together will also form a strong and secure seam When soldered.After the Walls of the IOO ribs B B are thus squeezed together and theside seam, b', soldered the ribs are folded or turned down flat againstthe rim of the barrel at each end, as indicated in Fig. 9, to affordasmooth seat for the heads or ends D of the barrel, which are thensecured in place.

The sides or walls b b of the triangular tapering grooves, as shown inFig. 2, may be squeezed together by any suitable tools or clamps, andany suitable tools or machines may be used for turning down the ribs Bat the ends of the barrel-body-as, for example, an ordinary hammer.

It is preferable to squeeze together` simultaneously the sides or wallsb b of all the folds or ribs in the barrel-body, as thereby the stockmore readily assumes the double curvature due to the circular form ofthe barrel in crosssection and its bilge or longitudinal curvature.

The degree of bilge or longitudinal curvature givento the barrel-bodymay be varied by increasing or diminishing the taper of the ribs orfolds B B from each end toward the middle, or by increasing ordiminishing the number of such ribs or folds in a barrel of a givendiameter. By giving the ribs or folds no taper whatever a cylindricalbody will be formed having the strengthening longitudinal ribs.

In the three joint applications of John G. Hodgson and myself, filed ofeven date herewith, there are shown and described special machines whichwe have devised for partially forming and spacing the longitudinal foldsfor squeezing the sides or walls of all of the folds or ribs togethersimultaneously, and for turning down the ribs at the ends of the body. Imake no claim to any of said machines as my sole invention, nor do Iherein claim the sheetmetal barrel-body shown and described, as thatconstitutes the subject of another application filed by me of even dateherewith.

The staves B, between the ribs B, have the shape and appearance ofstaves in an ordinary barrel, the ribs marking the divisions between thestaves.

It should also be observed that the folds or ribs B taper on aslightly-curved line,instead of on a straight line, in order to give theproper curvature or bilge to the barrel without stretching the stock,and that thelines a a,on which the folds are made, are slightly curved.

I claime 1. The process or method of making sheetmetal barrel-formbodies from a rectangular sheet, consisting in forming a series ofgoreshape inwardly-projecting flat folds or ribs therein, tapering fromeach end toward the middle and extending longitudinally from end to endof the sheet, whereby'the surplus stock is taken up and the diametercontracted at each end and the barrel given a smooth eX` terior withstave-line divisions, substantially as specified.

2. The process of making sheet-metal barrelform bodies from a sheet,consisting in first forming a series of longitudinal grooves or channelstherein tapering from each end toward the middle, and then squeezing thewalls of such grooves or channels together, substantially as specified.

3. The process of making sheet-metal barrelform bodies from a sheet,consisting in first forming a series of longitudinal grooves or channelstherein tapering from each end toward the middle, and then squeezing theWalls of such grooves or channels together, forming tapering ribs, andnally turning or folding down said ribs at the end of the barrel to formseats for the barrel-heads,v substantially as specified. ,l

4. A process or method of making sheetmetal barrel-form bodies from asheet, consisting in forming a series of goreshape inwardly-projectingflat folds or ribs therein, tapering on curved lines from each endtow-.1rd the middle, substantially as specified.

EDWIN NORTON.

Witnesses:

S. W. NORTON, O. P. SWIFT.

